Sierra Leone rides frontier exploration wave as Eni snares acreageItalian major moves fast to snap up five blocks, with eyes firmly on big Vega prospect

Sierra Leone has emerged from the exploration shadows cast by neighbouring Liberia and Ivory Coast after signing a major exploration deal with Eni that could see a wildcat drilled, possibly in 2026, on a huge deepwater structure that has been tantalising explorers for years.


Italian energy company Eni has signed a major exploration agreement for five offshore blocks in Sierra Leone, focusing on the large Vega prospect, a move signaling renewed interest in the country’s frontier exploration potential. This deal includes geological and geophysical studies across blocks G113, G129, G130, G131, and G132, covering approximately 6,790 km² of deepwater acreage. Eni’s entry, which is the first major deal in Sierra Leone after previous exploration efforts confirmed an active petroleum system but no commercial discovery, is seen as a confidence boost for the nation’s offshore potential and regulatory framework.


The agreement: Eni has secured the rights to conduct technical reconnaissance in five blocks, including extensive survey work such as 3D seismic data collection and reprocessing.
The Vega prospect: A key target is the large Vega prospect, a structure estimated to hold a significant amount of potential recoverable oil.


Significance for Sierra Leone: The deal is a major step for Sierra Leone’s petroleum sector, as it’s the first major exploration agreement after many years. The government views Eni’s involvement as a crucial signal to other potential investors.


Background: Past exploration in the area by companies like Anadarko and Tullow confirmed the existence of oil but did not result in commercial finds. This new agreement aims to re-evaluate the potential with updated technology.